Buffing and polishing device



Dec 6, 1949 A, R, RASKE 2,490,472

BUFFING AND POLISHING DEVICE Filed March 25, 1948 INVENTOR. 4271/1/19 A? PA was Patented Dec. 6, 1949 UNITED STATES PATENT OFFICE BUFFING AND POLISHING DEVICE Arthur R. Raske, Detroit, Mich.

Application March 25, 1948, Serial No. 16,922

Claims.

rality of endless bands of contacting material.

such as emery cloth or bufling material and in such a manner that the inflated supporting membe! will retain the encircling band in position during their operation and in such a manner that when one of the bands is worn out its removal ill -expose the underlying band for operation.

Another object of the invention is the provision in a device of this class of a supporting core so arranged and constructed that the inflatable member mounter thereon may be rigidly held in position and prevented, when under pressure, from becoming disarranged.

Another object of the invention is the provision of a device of this class so arranged and constructed that the various parts may be easily and quickly assembled.

Another object of the invention is the provisionof a device of this class which will be simple in structure and economical to manufacture, durable and highly efiicient in use.

Other objects will appear hereinafter.

It is recognized that various modifications and changes may be made in the detail of structure illustrated without departing from the invention and it is intended that such shall be embraced within the scope of the claims which form a part hereof.

Forming a part of this specification are drawings in which:

' Fig. 1 is a central sectional view of the invention,

Fig. 2 is a fragmentary sectional view taken on line 2-2 of Fig. 1.

In the drawings, as shown, the invention comprises a supporting core I which can be made of wood, plastic or any other suitable material and which is cut away as at 8 to provide the reduced portion. Onopposite sides this core I is provided with a circular groove 9 and 9a and extending centrally through the core 1 is a bore Ill. 1

-A flexible bag l'l, formed from rubber or other suitable material, is provided and comprises the oppositely disposed end walls II and I3 and the 2 periphery l2. There is formed centrally through these walls II and I3 the registering openings I 4 and [4a through which the core may be inserted, the walls stretching sufficiently for this purpose. Extending inwardly from each of the walls I l and I3 is a circular rib l5 which is adapted to lie in the cut away portion 8. Extending inwardly from each of the walls H and I3 is a circular rib it which engages in the groove 9 Engaging the outer faces of the walls II and i3 are the rigid plates or disks I1 and I8 respectively.

Engaging in the bore is a pressure exerting mechanism adapted for clamping the plates I1 and I8 against the walls H and I3 for clamping them against the opposite faces of the supporting core 1, this pressure exerting mechanism comprising member l9 which is provided on its outer end with the clamping flange 2D and provided with an internally threaded bore 2| which may be threaded on a rotating arbor or other suitable device. The inner end of the member I9 is reduced at 22 and externally threaded and threaded on to this reduced portion 22 is the internally threaded member 23 having a flange 24 on its outer end. Formed in the reduced portion 22 is a passage 25 communicating through lateral passages 26 and 21 formed in the core of supporting member I, so that passage 25 is in communication with the space 23. Mounted in the member 22 is a suitable air valve 29 having a cap 30 on the valve 29 being so constructed that when the air is delivered under pressure to the member 29 it will pass through the passage into the space 28 and thus in turn inflate the supporting member.

Embracing the periphery I2 is a plurality of endless bands 3|, 32, and 33 formed from suitable bufling or polishing material and positioned concentrically of each other so that when the flexible supporting member is inflated, members 3|, 32, and 33 will be held firmly in position. A gasket 34 underlies the flange 20 and a gasket 35 underlies the flange 24.

The construction is such that when the parts are assembled as shown in Fig. 1 and the member 23 is threaded onto the portion or member 22 and walls H and [3 will be tightly clamped against the side faces of the core or rigid support 1, the construction being such that leakage of air is avoided. The use of the ribs I5 and I6 serves to provide a structure whereby the movement away from the center of the supporting core i is avoided when flexible supporting member is inflated under heavy pressure. These ribs also serve to prevent leakage of air and particularly prevent a radial outward movement of the flexible member when being rotated at high speeds.

It is believed obvious that the device may be easily and quickly assembled and dis-assembled so that the removal and replacement of the overlying embracing material may be effected. When the outer layer of bufling or polishing material is used up and removed the underlying layer will of course be exposed for functioning, thus eliminating the necessity of dis-assembling the device and replacing the bands of operative material as soon as they become worn out.

What I claim as new is:

1. A bufling and polishing wheel .of the class described, comprising: a rigid core having a bore formed centrally therethrough and provided at its opposite ends, at the periphery, with .a cut away portion and having, inwardly from the periphery on opposite ends, a circular groove; a supporting bag of air-impervious, flexible material mounted on said core and having, on opposite end walls, a central opening registering with the bore in said core; a circular inwardly projecting rib on each of the end walls of said bag engaging the cut away portion of said core; acircular, inwardly projecting rib on each of said end walls engaging in the groove formed in end faces of said core; inter-engaging members projected into said bore from opposite sides thereof and adapted upon inter-engaging for clamping the end walls of said bag against the end faces of said core, the core having a passage formed therein communicating with an air inlet passage formed in one of said engaging members for delivering air into the interior of said bag for inflating said bag.

2. A buffing and polishing wheel of the class described, comprising: a rigid core having a bore formed centrally therethrough and provided at its opposite ends, at the periphery, with a cut away portion and having, inwardly from the periphery, on opposite ends, a circular groove; a supporting bag of air-impervious, flexible material mounted on said core and having on opposite end walls a central opening registering with the bore in said core; a circular inwardly projecting rib on each of the end walls of said bag engaging the cut away portion of said core; a circular, inwardly projecting rib on each of said end walls engaging in the groove formed in the end faces of said core; inter-engaging members projecting into said bore from opposite sides thereof and adapted upon inter-engagement for clamping the end walls of said bag against the end faces of said core, said core having a passage formed therein communicating with an air inlet passage formed in one of said engaging members for delivering air into the interior of said bag for inflating said bag; and an endless band of polishing material embracing the periphery of said bag and adapted upon the inflating of said bag for being held rigidly on said bag.

3. A bufflng and polishing wheel of the class described, comprising; a rigid core having a bore formed centrally therethrough and provided at its opposite ends, at the periphery, with a cut away portion and having, inwardly from the periphery, on opposite ends a circular groove; a supporting bag of air-impervious, flexible material mounted on said core and having on opposite end walls a central opening registering with the bore in said core; a circular, inwardly projecting rib on each of the end walls of said bag engaging the cut away portion of said core; a circular, inwardly projecting rib on each of said end walls engaging in the groove formed in end faces of said core; inter-engaging members projected into said bore from opposite sides thereof and adapted upon interengagement for clamping the end walls of said bag against the end faces of said core, said core having a passage formed therein communicating with an air inlet passage formed in one of said engaging members for delivery of air into the interior of said bag for inflating said bag; and a plurality of concentrically arranged endless bands of abrasive material in embracing relation to the periphery of said bag and adapted, upon the inflation of said bag, for being held rigidly on said bag.

4. In a polishing and buffing device in the class described, a core having a central bore formed therethrough provided with a radial passage communicating with said bore and provided on opposite end faces with a circular groove positioned inwardly from the periphery thereof and provided, at the periphery at opposite ends'with a cut away portion; a circular, flexible, air-impervious bag having registering circular openings in its opposite end walls and adapted for mounting on said core; an inwardly projecting circular rib on each of said end walls engaging the cut away portion of said core; an inwardly projecting circular rib on each of said end walls engaging in said groove in said core; a rigid plate engaging each of the end walls of said bag; a flange bearing member internally threaded and projecting into said bore from one end, said flange being adapted for pressing a plate against an end wall of said bag for clamping an end against the face of said core; an externally threaded member projected into said bore from the opposite end and threaded into said flrst mentioned member; a flange on the outer end of said externally threaded member for clamping a plate against the other end wall of said bag for clamping the same against the other end face of said core, said externally threaded member having a passage communicating with the passage in said core for delivering air into the interior of said bag for inflating the same.

5. In a polishing and bufling device in the class described, a core having a central bore formed therethrough and provided with a radial passage communicating with said bore and provided on opposite end faces with a circular groove positioned inwardly from the periphery thereof and provided at the periphery at opposite end faces with a cut away portion; a circular, flexible. air-impervious bag having registering circular openings in opposite end walls and adapted for mounting on said core; an inwardly projecting circular rib on each of said end walls engaging the cut away portion of said core; an inwardly projecting circular rib on each of said end walls engaging in said groove of said core; a rigid plate engaging each of the end walls of said bag; a flange-bearing member internally threaded and projected into said bore from one end, said flange being adapted for pressing a plate against one end wall of said bag for clamping the same against an end face of said core; an externally threaded member projecting into said bore from the opposite end and threaded into said first mentioned member; a flange on the outer end of said externally threaded member for clamping the plate against the other end wall of said has for clamping the same against an end face 01 said core, said externally threaded member having a passage communicating with the passage in said core for delivering air into the interior of said bag for inflating the same; and a plurality of concentrically superimposed endless bands of abrasive and polishing material embracing the periphery of said bag and adapted, upon the inflation of said bag for being mounted on the periphery of said bag.

ARTHUR R. RASKE'.

REFERENCES CITED Number The following references are of record in the 10 Number file of this patent:

6 UNITED STATES PATENTS Name Date Webster Mar. 7, 1893 Herder Feb. 6, 1923 Simonson Mar. 20, 1934 Reed Oct. 15, 1935 Ricks et a1. Mar. 2, 1937 FOREIGN PATENTS Country Date Australia Feb. 6, 1936 

